Faith is harder to shake than knowledge, love succumbs less to change than respect, hate is more enduring than aversion, and the impetus to the mightiest upheavals on this earth has at all times consisted less in a scientific knowledge dominating the masses than in a fanaticism which inspired them and sometimes in a hysteria which drove them forward.

The art of leadership . . . consists in consolidating the attention of the people against a single adversary and taking care that nothing will split up that attention. . . . The leader of genius must have the ability to make different opponents appear as if they belong to one category.